Intro to sockets?

[jim frost]

Thanks for reposting my primer, but please note that there is a
serious bug in the fireman() function.  It's defined in the 11/22/89
version as:

  void fireman()
  { union wait wstatus;

    while(wait3(&wstatus,WNOHANG,NULL) >= 0);
  }

It should be:

  void fireman()
  { union wait wstatus;

    while(wait3(&wstatus,WNOHANG,NULL) > 0);
  }

This minor difference results in some pretty dramatic hanging on your
server's part in some instances :-).  I have a newer version of the
tutorial available (Feb something-or-other 1990) which corrects this
bug (there may be other differences, I can't remember).  Please send
requests for the update to jimf at saber.com (..!harvard!saber!jimf).

Happy hacking,

jim frost
saber software
jimf at saber.com